feat(scheduler): add snapshot-seed CLI and 10m seed deferral

Add `python app.py snapshot-seed [--date]` (offline clone, Debian /
docker compose exec friendly). When seed fires while full-site snapshot
is running, or last_completed is missing (no_source), record skip as
non-success and retry in 10 minutes until a real seed succeeds; fans
and quiet-window rules unchanged.

tests/test_cli.py

@@ -332,6 +332,153 @@ def test_backfill_followers_dry_run():
         assert '"total": 0' in output
 
 
+
+def test_help_lists_snapshot_seed():
+    from reaction_board.cli import _build_parser
+
+    parser = _build_parser()
+    help_text = parser.format_help()
+    assert "snapshot-seed" in help_text
+    args = parser.parse_args(["snapshot-seed", "--date", "2026-10-31"])
+    assert args.command == "snapshot-seed"
+    assert args.date == "2026-10-31"
+
+
+def test_snapshot_seed_cli_clones_offline():
+    from reaction_board.bilibili.models import FavResource
+
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp, cookie="", csrf="")
+        code, _ = run_cli(["init", "--config", str(path)])
+        assert code == 0
+        db = Database(Path(tmp) / "app.db")
+        db.initialize()
+        try:
+            repo = Repository(db)
+            media_id = 11
+            repo.upsert_from_fav(
+                FavResource(
+                    aid=1, bvid="BV1xx411c7mD", title="t", up_mid=9,
+                    up_name="u", pubdate=1, duration=10, cover=None,
+                    attr=0, fav_time=None,
+                ),
+                media_id,
+                was_added=True,
+            )
+            yday, today = "2026-10-30", "2026-10-31"
+            repo.upsert_snapshot(
+                yday, 1,
+                metrics={"view": 10, "like": 1, "coin": 0, "favorite": 0,
+                         "share": 0, "reply": 0, "danmaku": 0},
+                ok=True, err=None, captured_at=1_800_000_000,
+            )
+            repo.kv_set("snapshot:last_completed", yday)
+            repo.kv_set("snapshot:completed:" + yday, "1")
+        finally:
+            db.close()
+
+        code, output = run_cli([
+            "snapshot-seed", "--config", str(path), "--date", today,
+        ])
+        assert code == 0, output
+        assert '"reason": "seeded"' in output
+        db = Database(Path(tmp) / "app.db")
+        db.initialize()
+        try:
+            repo = Repository(db)
+            assert repo.kv_get("snapshot:seeded:" + today) == "1"
+            row = repo.get_snapshot(today, 1)
+            assert row is not None and int(row["view"]) == 10
+            assert row["src"] == "seed"
+        finally:
+            db.close()
+
+
+def test_snapshot_seed_defers_when_snapshot_running():
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp, cookie="", csrf="")
+        code, _ = run_cli(["init", "--config", str(path)])
+        assert code == 0
+        db = Database(Path(tmp) / "app.db")
+        db.initialize()
+        try:
+            repo = Repository(db)
+            repo.kv_set(
+                "task:running:snapshot",
+                json.dumps({"name": "snapshot", "started_at": 1}),
+            )
+            repo.kv_set("snapshot:last_completed", "2026-10-30")
+        finally:
+            db.close()
+
+        code, output = run_cli([
+            "snapshot-seed", "--config", str(path), "--date", "2026-10-31",
+        ])
+        assert code == 1, output
+        assert "snapshot_running" in output
+        db = Database(Path(tmp) / "app.db")
+        db.initialize()
+        try:
+            repo = Repository(db)
+            last = json.loads(repo.kv_get("task:last:snapshot_seed"))
+            assert last["ok"] is False
+            assert last["skipped"] is True
+            assert last["error"] == "snapshot_running"
+            assert repo.kv_get("task:running:snapshot_seed") is None
+            assert repo.kv_get("task:running:snapshot") is not None
+        finally:
+            db.close()
+
+
+def test_snapshot_seed_no_source_is_non_success():
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp, cookie="", csrf="")
+        code, _ = run_cli(["init", "--config", str(path)])
+        assert code == 0
+        code, output = run_cli([
+            "snapshot-seed", "--config", str(path), "--date", "2026-10-31",
+        ])
+        assert code == 1, output
+        assert "no_source" in output
+        db = Database(Path(tmp) / "app.db")
+        db.initialize()
+        try:
+            repo = Repository(db)
+            last = json.loads(repo.kv_get("task:last:snapshot_seed"))
+            assert last["ok"] is False and last["skipped"] is True
+            assert last["error"] == "no_source"
+        finally:
+            db.close()
+
+
+def test_defer_snapshot_seed_schedules_ten_minutes():
+    """调度辅助：skip 记非成功，next_run = finished + 600。"""
+    from reaction_board.logging_json import JsonLogger
+
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp, cookie="", csrf="")
+        code, _ = run_cli(["init", "--config", str(path)])
+        assert code == 0
+        db = Database(Path(tmp) / "app.db")
+        db.initialize()
+        try:
+            repo = Repository(db)
+            logger = JsonLogger()
+            started = 1_800_000_000
+            finished = started + 5
+            ctrl = cli._defer_snapshot_seed(
+                repo, logger, started_at=started, reason="snapshot_running",
+                finished_at=finished,
+            )
+            assert ctrl.ok is False
+            assert ctrl.error == "snapshot_running"
+            assert abs(ctrl.next_run - (finished + cli._SEED_RETRY_SECONDS)) < 0.01
+            last = json.loads(repo.kv_get("task:last:snapshot_seed"))
+            assert last["skipped"] is True and last["ok"] is False
+        finally:
+            db.close()
+
+
 def main_test():
     test_init_and_status()
     test_missing_config()
@@ -345,7 +492,12 @@ def main_test():
     test_snapshot_backup_failure_returns_error_and_retries()
     test_candidates_and_discover_commands()
     test_backfill_followers_dry_run()
-    print("OK: CLI init/sync/snapshot/auth-check/run/status/backfill/错误路径测试全部通过")
+    test_help_lists_snapshot_seed()
+    test_snapshot_seed_cli_clones_offline()
+    test_snapshot_seed_defers_when_snapshot_running()
+    test_snapshot_seed_no_source_is_non_success()
+    test_defer_snapshot_seed_schedules_ten_minutes()
+    print("OK: CLI init/sync/snapshot/snapshot-seed/auth-check/run/status/backfill/错误路径测试全部通过")
 
 
 if __name__ == "__main__":